You can reset your phone to its original settings, with or without deleting all of your personal data. It is possible to reset the phone to the state it was in before you first turned it on. But before you perform a reset, make sure to back up any important data saved on your phone. Note: to avoid permanent damage, do not restart the phone while a reset procedure is underway.

To reset your Xperia neo L, do the following instructions:

From your Home Screen, tap

Find and tap Settings > Backup and Reset

Tap Factory Data Reset

To erase not only internal storage but also other user data such as pictures and music, mark the Erase SD card checkbox.